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Http 508 error seems related to WebDav : i think you have another system on your server. I think it's server related and not LimeSurvey related
https://en.wikipedia.org/wiki/List_of_HTTP_status_codes#5xx_Server_errors |
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Well, yes, the 508 error is related to WebDAV, but I don't understand what you mean when you say that I have "another system" on the server. WebDAV is just an extended HTTP protocol that most modern servers use to manage shared access to the filesystem. I can assure you that when these errors occur, ONLY LimeSurvey is running, nothing else. The web host is a very standard Apache server and there are no other scripts installed. I also get exactly the same errors with LimeSurvey on all three of my remote hosting accounts, which are hosted on different servers. Finally, as I mentioned in the problem description, this issue only started happening from version 3 on. The previous versions of LimeSurvey did not suffer from resource loading errors.
The description for the 508 error actually speaks for itself: "The server detected an infinite loop while processing the request." This indicates that a script has produced a loop that went on beyond the server's timeout period on the request. And there is NO OTHER script running, besides LimeSurvey... |
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508 error come from WebDav, not apache.
I don't know how you manage your server, but no one can reproduce this issue, and clearly : LimeSurvey never send 508 error …
Activate debug mode to find if you have anything else
And you have a 508 error on a favicon.ico file : THIS CAN NOT BE RELATED TO LIMESURVEY |
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Thanks, Denis. I realize that the 508 errors are not coming from LimeSurvey, but from the server. They only occur, however, in conjunction with LimeSurvey requests. On one of the three hosts, I also have the phpBB forum installed, and there are no page load problems with that script, ever. To me, all this indicates that the issues probably stem from the way LimeSurvey scripts behave in combination with the resource management settings on the server. I'll take a look at the debug logs and report back. |
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Yes :)
Maybe something related to htaccess too. |
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So, here is the situation. I've tried to isolate a single faulty page load event and then looked at the server usage log, which showed that the entry process resource limit was hit 7 times during that page load -- one for every "508 loop detected" error in the Chrome debug console output (see attached images). You will notice that all of those failed loads were for LimeSurvey resources (under the http://apuv.x10.mx/encuestas directory). Now, here is the weird thing: as that page just sat there apparently idle for a while, more errors kept appearing in the console output (see attached), without me even touching anything, and the resource usage log caught 16 more entry process limit hits. Once again, ALL the failed loads were for LimeSurvey resources.
Any thoughts?
2018-12-02 06_54_49 - Additional Chrome console output.txt (5,458 bytes)
Uncaught (in promise) 6603:1
{success: false, error: "Not Found", transferStatus: "error", xhr: {…}}
jquery-3.1.1.min.js:4
GET http://apuv.x10.mx/encuestas/index.php/admin/survey/sa/getAjaxQuestionGroup…hqUVVoTzNKcGx4dmp4Z1BXZXYkyixJSN1MLc2RH7zIpjYsrg6vvG6-ZQiZmbr3lCBdmQ%3D%3D 404 (Not Found)
Uncaught (in promise) 6603:1
{success: false, error: "Not Found", transferStatus: "error", xhr: {…}}
jquery-3.1.1.min.js:4
GET http://apuv.x10.mx/encuestas/index.php/admin/survey/sa/getAjaxMenuArray/sur…1BXZXYkyixJSN1MLc2RH7zIpjYsrg6vvG6-ZQiZmbr3lCBdmQ%3D%3D&position=collapsed 503 (Service Unavailable)
Uncaught (in promise) 6603:1
{success: false, error: "Service Unavailable", transferStatus: "error", xhr: {…}}
jquery-3.1.1.min.js:4
GET http://apuv.x10.mx/encuestas/index.php/admin/survey/sa/getAjaxMenuArray/sur…p4Z1BXZXYkyixJSN1MLc2RH7zIpjYsrg6vvG6-ZQiZmbr3lCBdmQ%3D%3D&position=bottom 503 (Service Unavailable)
Uncaught (in promise) 6603:1
{success: false, error: "Service Unavailable", transferStatus: "error", xhr: {…}}
jquery-3.1.1.min.js:4
GET http://apuv.x10.mx/encuestas/index.php/admin/survey/sa/getAjaxMenuArray/sur…4dmp4Z1BXZXYkyixJSN1MLc2RH7zIpjYsrg6vvG6-ZQiZmbr3lCBdmQ%3D%3D&position=top 404 (Not Found)
Uncaught (in promise) 6603:1
{success: false, error: "Not Found", transferStatus: "error", xhr: {…}}
jquery-3.1.1.min.js:4
GET http://apuv.x10.mx/encuestas/index.php/admin/survey/sa/getAjaxMenuArray/sur…dmp4Z1BXZXYkyixJSN1MLc2RH7zIpjYsrg6vvG6-ZQiZmbr3lCBdmQ%3D%3D&position=side 404 (Not Found)
Uncaught (in promise) 6603:1
{success: false, error: "Not Found", transferStatus: "error", xhr: {…}}
jquery-3.1.1.min.js:4
GET http://apuv.x10.mx/encuestas/index.php/admin/survey/sa/getAjaxQuestionGroup…hqUVVoTzNKcGx4dmp4Z1BXZXYkyixJSN1MLc2RH7zIpjYsrg6vvG6-ZQiZmbr3lCBdmQ%3D%3D 404 (Not Found)
Uncaught (in promise) 6603:1
{success: false, error: "Not Found", transferStatus: "error", xhr: {…}}
jquery-3.1.1.min.js:4
GET http://apuv.x10.mx/encuestas/index.php/admin/survey/sa/getAjaxQuestionGroup…hqUVVoTzNKcGx4dmp4Z1BXZXYkyixJSN1MLc2RH7zIpjYsrg6vvG6-ZQiZmbr3lCBdmQ%3D%3D 503 (Service Unavailable)
Uncaught (in promise) 6603:1
{success: false, error: "Service Unavailable", transferStatus: "error", xhr: {…}}
jquery-3.1.1.min.js:4
GET http://apuv.x10.mx/encuestas/index.php/admin/survey/sa/getAjaxMenuArray/sur…p4Z1BXZXYkyixJSN1MLc2RH7zIpjYsrg6vvG6-ZQiZmbr3lCBdmQ%3D%3D&position=bottom 404 (Not Found)
Uncaught (in promise) 6603:1
{success: false, error: "Not Found", transferStatus: "error", xhr: {…}}
jquery-3.1.1.min.js:4
GET http://apuv.x10.mx/encuestas/index.php/admin/survey/sa/getAjaxMenuArray/sur…1BXZXYkyixJSN1MLc2RH7zIpjYsrg6vvG6-ZQiZmbr3lCBdmQ%3D%3D&position=collapsed 404 (Not Found)
Uncaught (in promise) 6603:1
{success: false, error: "Not Found", transferStatus: "error", xhr: {…}}
jquery-3.1.1.min.js:4
GET http://apuv.x10.mx/encuestas/index.php/admin/survey/sa/getAjaxMenuArray/sur…4dmp4Z1BXZXYkyixJSN1MLc2RH7zIpjYsrg6vvG6-ZQiZmbr3lCBdmQ%3D%3D&position=top 404 (Not Found)
Uncaught (in promise) 6603:1
{success: false, error: "Not Found", transferStatus: "error", xhr: {…}}
jquery-3.1.1.min.js:4
GET http://apuv.x10.mx/encuestas/index.php/admin/survey/sa/getAjaxMenuArray/sur…dmp4Z1BXZXYkyixJSN1MLc2RH7zIpjYsrg6vvG6-ZQiZmbr3lCBdmQ%3D%3D&position=side 404 (Not Found)
Uncaught (in promise) 6603:1
{success: false, error: "Not Found", transferStatus: "error", xhr: {…}}
jquery-3.1.1.min.js:4
GET http://apuv.x10.mx/encuestas/index.php/admin/survey/sa/getAjaxMenuArray/sur…1BXZXYkyixJSN1MLc2RH7zIpjYsrg6vvG6-ZQiZmbr3lCBdmQ%3D%3D&position=collapsed 503 (Service Unavailable)
Uncaught (in promise) 6603:1
{success: false, error: "Service Unavailable", transferStatus: "error", xhr: {…}}
jquery-3.1.1.min.js:4
GET http://apuv.x10.mx/encuestas/index.php/admin/survey/sa/getAjaxMenuArray/sur…4dmp4Z1BXZXYkyixJSN1MLc2RH7zIpjYsrg6vvG6-ZQiZmbr3lCBdmQ%3D%3D&position=top 404 (Not Found)
Uncaught (in promise) 6603:1
{success: false, error: "Not Found", transferStatus: "error", xhr: {…}}
jquery-3.1.1.min.js:4
GET http://apuv.x10.mx/encuestas/index.php/admin/survey/sa/getAjaxMenuArray/sur…p4Z1BXZXYkyixJSN1MLc2RH7zIpjYsrg6vvG6-ZQiZmbr3lCBdmQ%3D%3D&position=bottom 404 (Not Found)
Uncaught (in promise) 6603:1
{success: false, error: "Not Found", transferStatus: "error", xhr: {…}}
jquery-3.1.1.min.js:4
GET http://apuv.x10.mx/encuestas/index.php/admin/survey/sa/getAjaxQuestionGroup…hqUVVoTzNKcGx4dmp4Z1BXZXYkyixJSN1MLc2RH7zIpjYsrg6vvG6-ZQiZmbr3lCBdmQ%3D%3D 404 (Not Found)
Uncaught (in promise) 6603:1
{success: false, error: "Not Found", transferStatus: "error", xhr: {…}}
jquery-3.1.1.min.js:4
GET http://apuv.x10.mx/encuestas/index.php/admin/survey/sa/getAjaxMenuArray/sur…dmp4Z1BXZXYkyixJSN1MLc2RH7zIpjYsrg6vvG6-ZQiZmbr3lCBdmQ%3D%3D&position=side 404 (Not Found)
Uncaught (in promise) 6603:1
{success: false, error: "Not Found", transferStatus: "error", xhr: {…}}
jquery-3.1.1.min.js:4
GET http://apuv.x10.mx/encuestas/index.php/admin/survey/sa/getAjaxMenuArray/sur…1BXZXYkyixJSN1MLc2RH7zIpjYsrg6vvG6-ZQiZmbr3lCBdmQ%3D%3D&position=collapsed 508 (Loop Detected)
Uncaught (in promise) 6603:1
{success: false, error: "Loop Detected", transferStatus: "error", xhr: {…}}
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Hi Denis,
A follow-up on this issue: I just migrated my LimeSurvey installation to an entirely different hosting provider, and am seeing exactly the same problem -- text fields and whole portions of forms refusing to load. Looking at the server statistics, I can see an uptick in both CPU usage and entry process faults (very similar to what was happening on the previous host). Unfortunately, this provider doesn't give access to detailed error logs for free accounts, but I think we would be just seeing more of the same thing, anyway. All of this sounds to me like some of the LimeSurvey scripts may not be releasing their processes properly when they are done with the page load. What do you think?
Also, I am surprised you flagged this issue as "minor," when it makes it impossible for the user to edit most parts of a survey. This is especially vexing when the survey is active, so you can't just edit it offline and reimport it. I have resorted to making edits directly in the database, through PHPMyAdmin. Not only that, but the fact that the script keeps hitting resource limits even under light loads is a worrisome problem in its own right, as it severely limits the number of concurrent users, even on reasonably-provisioned servers. Why should it not be considered a MAJOR issue?
Regards,
Oleg. |
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Please update to the latest version and check if the bug can still be reproduced. Thank you. |
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Hello oleggorfinkel,
we have asked for feedback on this issue. Because we did not get an answer we assume that the issue is resolved.
However, should you be able to reproduce the issue using the latest version, please feel free to re-open the issue and give us exact details on how to reproduce it.
Thank you and best regards,
galads |
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